| LOCTITE® 401 is a one-part, surface-insensitive instant adhesive that offers fast fixturing and high shear strength on a wide range of materials. It is suitable for difficult-to-bond substrates like PP, PE, and PTFE when used with LOCTITE® SF 770, and also works well on porous materials such as wood, paper, leather, and fabric. |
- Universal industrial instant adhesive
- Very high-strength on close-fitting parts
- Reduced hazardous ingredients for improved occupational safety
- Bonds a wide range of similar or dissimilar substrates (metals, rubber, wood, cardboard, ceramics, and most plastics)
- Assembles difficult-to-bond materials using LOCTITE SF 770 primer
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Product Description
Loctite 401
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| Application Method |
Dispense system, Manual |
| Applications |
Bonding close fitting parts, Repairing |
| Color |
Clear |
| Cure Type |
Moisture cure |
| Fixture time, Steel |
5.0 sec. |
| Gap fill |
0.15 mm |
| Key characteristics |
General purpose, Strength: high strength, Viscosity: low viscosity, fixture: very fast fixture |
| Operating temperature |
-40.0 - 120.0 °C (-40.0 - 250.0 °F ) |
| Physical form |
Liquid |
| Recommended for use with |
Elastomer, Metal, Plastic, Porous surface |
| Shear strength, Mild Steel (grit blasted) |
20.0 N/mm² (2900.0 psi ) |
| Viscosity |
100.0 mPa·s (cP) |
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Step 1: Preparation - Cleaning
- It is recommended to use the correct LOCTITE® cleaner for the surface to be bonded (such as LOCTITE® SF 7070™) to degrease and clean surfaces prior to applying the adhesive.
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Step 2: Preparation - Priming
- To improve adhesion on difficult to bond plastic surfaces, apply LOCTITE® SF 770™ to the bond area by brushing or dipping. Avoid applying excess primer. Allow the primer to dry.
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Step 3: Preparation - Activation
- If cure speed is too slow, use activator LOCTITE® SF 7452™ or LOCTITE® SF 7455™ (see cure speed vs activator graph in TDS). Apply activator to one bond surface by spray, brush or dipping (not primed surfaces). Allow the activator to dry.
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Step 4: Application
- Apply adhesive onto one side/part.
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Step 5: Assembly
- Assemble parts immediately. The parts should be accurately located as the short fixture time leaves little opportunity for adjustment. Bond should be held or clamped until the adhesive has fixtured. Hint: if necessary, excess product can be cured by activator LOCTITE® SF 7452™. Spray or drop activator onto excess product.
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